Navegar

Colección

Datos Estadísticas

Artículo

El editor solo permite decargar el artículo en su versión post-print desde el repositorio. Por favor, si usted posee dicha versión, enviela a
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

This paper studies the temporal and spatial patterns of precipitation anomalies over southern central South America (SCSA: 22-40°S and 54-70°W), and their relationship with the sea-surface temperature (SST) variability over the surrounding tropical and subtropical Atlantic and Pacific Oceans. The data include monthly precipitation from 68 weather stations in central-northern Argentina and neighbouring Brazil. Paraguay and Uruguay, and monthly SSTs from the NOAA dataset with a 2° resolution for the period 1961-93. We use the method of canonical correlation analysis (CCA) to study the simultaneous relationship between bi-monthly precipitation and SST variability. Before applying the CCA procedure, standardized anomalies are calculated and a prefiltering is applied by means of an empirical orthogonal function (EOF) analysis. Thus, the CCA input consists of 10 EOF modes of SST and between 9 and 11 modes for precipitation and their corresponding principal components, which are the minimum number of modes necessary to explain at least 80% of the variance of the corresponding field. The results show that November-December presents the most robust association between the SST and SCSA precipitation variability, especially in northeastern Argentina and southern Brazil, followed by March-April and May-June. The period January-February, in contrast, displays a weak relationship with the oceans and represents a temporal minimum of oceanic influence during the summer semester. Based on the CCA maps, we identify the different oceanic and SCSA regions, the regional averages of SST and precipitation are calculated, and linear correlation analysis are conducted. The periods with greater association between the oceans and SCSA precipitation are November-December and May-June. During November-December, every selected region over SCSA reflects the influence of several oceanic regions, whereas during May-June only a few regions show a direct association with the oceans. The Pacific Ocean regions have a greater influence and are more widespread over SCSA; the Atlantic Ocean regions have an influence only over the northwestern and the southeastern parts of SCSA. In general, the relationship with the equatorial and tropical Atlantic and Pacific Oceans is of the type warm-wet/cold-dry, whereas the subtropical regions of both oceans show the opposite relationship, i.e. warm-dry/cold-wet. © 2004 Royal Meteorological Society.

Registro:

Documento: Artículo
Título:The influence of the tropical and subtropical Atlantic and Pacific Oceans on precipitation variability over southern central South America on seasonal time scales
Autor:Berri, G.J.; Bertossa, G.I.
Filiación:Department of Atmosph./Oceanic Sci., University of Buenos Aires, Buenos Aires 1428, Argentina
Palabras clave:Canonical correlation analysis; Precipitation; Sea-surface temperature; Southern South America; Data reduction; Functions; Oceanography; Precipitation (meteorology); Temperature measurement; Precipitation anomalies; Sea-surface temperature (SST); Climatology; atmosphere-ocean coupling; canonical analysis; precipitation (climatology); principal component analysis; sea surface temperature; seasonal variation; spatial variation; Atlantic Ocean; Pacific Ocean; South America
Año:2004
Volumen:24
Número:4
Página de inicio:415
Página de fin:435
DOI: http://dx.doi.org/10.1002/joc.1000
Título revista:International Journal of Climatology
Título revista abreviado:Int. J. Climatol.
ISSN:08998418
CODEN:IJCLE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08998418_v24_n4_p415_Berri

Referencias:

  • Antico, P.A., Berri, G.J., The subtropical jet stream over South America (2000) Preprints XI Brazilian Congress of Meteorology, , Rio de Janeiro, Brazil
  • Barnett, T.P., Preisendorfer, R.W., Origins and levels of monthly and seasonal forecast skill for United States surface air temperatures determined by canonical correlations analysis (1987) Monthly Weather Review, 115, pp. 1825-1850
  • Barnos, V., Silvestri, G., The relation between sea surface temperature at the subtropical South-Central Pacific and precipitation in southeastern South America (2002) Journal of Climate, 15, pp. 251-267
  • Barros, V., González, M., Liebmann, B., Camilloni, I., Influence of the South Atlantic convergence zone and South Atlantic sea surface temperature on interannual summer rainfall variability in southeastern South America (2000) Theoretiral and Applied Climatology, 67, pp. 123-133
  • Berri, G.J., Flamenco, E.A., Spescha, L., Tanco, R.A., Hurtado, R., Some effects of La Niña on summer rainfall, water resources and crops in Argentina (2002) la Niña and Its Societal Impacts: Facts and Speculation, , Glantz MH (ed.), United Nations University Press
  • Berri, G.J., Ghietto, M.A., Garcia, N.O., The influence of ENSO in the flows of the Upper Paraná River of South America over the past 100 years (2002) Journal of Hydrometeorology, 3, pp. 57-65
  • Carvalho, L.M., Jones, C., Liebmann, B., Extreme precipitation events in southeastern South America and large-scale convective patterns in the South Atlantic convergence zone (2002) Journal of Climate, 15, pp. 2377-2394
  • Díaz, A.F., Studzinski, C.D., Mechoso, C.R., Relationships between precipitation anomalies in Uruguay and southern Brazil and sea surface temperature in the Pacific and Atlantic Oceans (1998) Journal of Climate, 11, pp. 251-271
  • Gan, M.A., Rao, V., Surface cyclogenesis over South America (1991) Monthly Weather Review, 119, pp. 1293-1302
  • Garreaud, R.D., Aceituno, P., Interannual rainfall variability over the South American Altiplano (2001) Journal of Climate, 14, pp. 2779-2789
  • Grimm, A.M., Feraz, S.E.T., Gomes, J., Precipitation anomalies in southern Brazil associated with El Niño and La Niña events (1998) Journal of Climate, 11, pp. 2863-2880
  • Grimm, A.M., Barros, V.R., Doyle, M.E., Climate variability in southern South America associatod with El Niño and La Niña events (2000) Journal of Climate, 13, pp. 35-58
  • Karoly, D., Southern Hemisphere circulation features associated with El Niño-southern oscillation events (1989) Journal of Climate, 2, pp. 1239-1252
  • Liebmann, B., Kiladis, G.N., Marengo, J.A., Ambrizzi, T., Glick, J.D., Submonthly convective variability over South America and the South Atlantic convergence zone (1999) Journal of Climate, 12, pp. 1877-1891
  • Mo, K.C., Higgins, R.W., The Pacific-South American modes and tropical convection during the Southern Hemisphere winter (1998) Monthly Weather Review, 126, pp. 1581-1596
  • Montecinos, A., Diaz, A., Aceituno, P., Seasonal diagnostic and predictability of rainfall in subtropical South America based on tropical Pacific SST (2000) Journal of Climate, 13, pp. 746-758
  • Nogués-Paegle, J., Mo, K.C., Alternating wet and dry conditions over South America during summer (1997) Monthly Weather Review, 125, pp. 279-291
  • Nogués-Paegle, J., Mo, K.C., Linkages between summer rainfall variability over South America and sea surface temperature anomalies (2002) Journal of Climate, 15, pp. 1389-1407
  • Paegle, J., A comparative review of South America low-jets (1998) Meteorologica, 23, pp. 73-81
  • Pisciottano, G., Diaz, A., Cazes, G., Mechoso, C., El-Niño southern oscillation impact on rainfall in Uruguay (1994) Journal of Climate, 7, pp. 1286-1302
  • Preisendorfer, R.W., (1988) Principal Component Analysis in Meteorology and Oceanography, , Elsevier
  • Robertson, A.W., Mechoso, C., Interannual and interdecadal variability of the South Atlantic convergence zone (2000) Monthly Weather Review, 128, pp. 2947-2957
  • Ropelewski, C.F., Halpert, M.S., Global and regional scale precipitation patterns associated with the El Niño/southern oscillation (1987) Monthly Weather Review, 115, pp. 1606-1626
  • Ropelewski, C.F., Halpert, M.S., Precipitation patterns associated with the high index phase of the southern oscillation (1989) Journal of Climate, 2, pp. 268-284
  • Wang, H., Fu, R., Cross-equatorial flow and seasonal cycle of precipitation over South America (2002) Journal of Climate, 15, pp. 1591-1608
  • Zhou, J., Lau, K.M., Does a monsoon climate exist over South America? (1998) Journal of Climate, 11, pp. 1020-1040

Citas:

---------- APA ----------
Berri, G.J. & Bertossa, G.I. (2004) . The influence of the tropical and subtropical Atlantic and Pacific Oceans on precipitation variability over southern central South America on seasonal time scales. International Journal of Climatology, 24(4), 415-435.
http://dx.doi.org/10.1002/joc.1000
---------- CHICAGO ----------
Berri, G.J., Bertossa, G.I. "The influence of the tropical and subtropical Atlantic and Pacific Oceans on precipitation variability over southern central South America on seasonal time scales" . International Journal of Climatology 24, no. 4 (2004) : 415-435.
http://dx.doi.org/10.1002/joc.1000
---------- MLA ----------
Berri, G.J., Bertossa, G.I. "The influence of the tropical and subtropical Atlantic and Pacific Oceans on precipitation variability over southern central South America on seasonal time scales" . International Journal of Climatology, vol. 24, no. 4, 2004, pp. 415-435.
http://dx.doi.org/10.1002/joc.1000
---------- VANCOUVER ----------
Berri, G.J., Bertossa, G.I. The influence of the tropical and subtropical Atlantic and Pacific Oceans on precipitation variability over southern central South America on seasonal time scales. Int. J. Climatol. 2004;24(4):415-435.
http://dx.doi.org/10.1002/joc.1000